doctest fix for abs(pi*I) should return pi

[dkrenn]

We have

sage: abs(pi*I)
abs(I*pi)

The result should be simply pi.

CC: @kcrisman

Component: symbolics

Keywords: absolute value, symbolic

Author: Ralf Stephan

Branch/Commit: c7a2de0

Reviewer: Karl-Dieter Crisman, Vincent Delecroix

Issue created by migration from https://trac.sagemath.org/ticket/12588

[dkrenn]

comment:1

The diskussion in sage-devel says that it is related to #6132, #7160 and #10064. Applying the patches from #7160 and #10064 do not solve the problem described above, so I opened this ticket.

[dkrenn]

Description changed:

--- 
+++ 
@@ -6,5 +6,5 @@
 ```
 which is wrong. The result should be `pi`.
 
-This was reported by Clemens Heuberger in [sage-devel](http://groups.google.com/group/sage-support/browse_thread/thread/28bbd04a78dadb57/01168722573ff736).
+This was reported by Clemens Heuberger in [sage-support](http://groups.google.com/group/sage-support/browse_thread/thread/28bbd04a78dadb57/01168722573ff736).